Department of Radiology (Women imaging), University of Lille, CHU of Lille, Hospital Jeanne de Flandre, 59000 Lille, France.
EA 2694, Department of Public Health, University of Lille, CHU of Lille, 59000 Lille, France.
Diagn Interv Imaging. 2020 Feb;101(2):79-89. doi: 10.1016/j.diii.2019.07.011. Epub 2019 Aug 28.
The objective of this study was to assess the reliability and reproducibility of existing and new computed tomography (CT)-pelvimetry measurements.
A retrospective cohort study of 63 women with a mean age of 33.9±5.2 (SD) years (range: 19-49 years) was conducted. Classical pelvimetry measurements were collected including the obstetric conjugate (OC), median transverse diameter (MTD), and interspinous diameter (ISD). Additionally, we used multiplanar reconstruction (MPR) mode to define two oblique planes: inlet pelvic plane (IPP) and mid-pelvic plane (MPP) and measure new pelvic parameters, including anteroposterior (APD), transverse diameters and circumference of both IPP and MPP (inletAPD, inletMTD, inletCIRC and midAPD, ISD, midCIRC, respectively). The reproducibility (intra- and inter-observer) of our results were assessed. Multivariate analyses using principal component analysis and clustering methods were conducted to analyze the association between pelvimetry measurements and identify patient sub-groups.
All linear measurements (OC, inletAPD, MTD, inletMTD, midAPD, and ISD) showed statistically "almost perfect" intra- and inter-observer correlation coefficients (range: 0.924-0.980). Circumferences (inletCIRC and midCIRC) showed statistically "almost perfect" intra- (range: 0.847-0.857) and inter-observer correlation coefficients (range: 0.923-0.957). The measurement of 6 pelvimetric parameters allowed determining three groups of pelvis size.
New pelvic measurements have excellent reproducibility and are similar to the classical measurements, based on the MPR analysis of CT planes adjusted to the inner bony pelvis.
本研究旨在评估现有的和新的计算机断层扫描（CT）骨盆测量的可靠性和可重复性。
对 63 名平均年龄为 33.9±5.2（SD）岁（19-49 岁）的女性进行了回顾性队列研究。收集了经典的骨盆测量值，包括产科入口（OC）、中矢状径（MTD）和棘突间径（ISD）。此外，我们还使用多平面重建（MPR）模式定义了两个斜平面：入口骨盆平面（IPP）和中骨盆平面（MPP），并测量了新的骨盆参数，包括前后径（APD）、IPP 和 MPP 的横径和周长（分别为入口 APD、入口 MTD、入口 CIRC 和中 APD、ISD、中 CIRC）。评估了我们结果的可重复性（观察者内和观察者间）。使用主成分分析和聚类方法进行了多变量分析，以分析骨盆测量值之间的关联，并确定患者亚组。
所有线性测量值（OC、入口 APD、MTD、入口 MTD、中 APD 和 ISD）均显示出统计学上“几乎完美”的观察者内和观察者间相关系数（范围：0.924-0.980）。周长（入口 CIRC 和中 CIRC）显示出统计学上“几乎完美”的观察者内（范围：0.847-0.857）和观察者间相关系数（范围：0.923-0.957）。测量 6 项骨盆测量值可以确定 3 组骨盆大小。
新的骨盆测量值具有极好的可重复性，与基于 CT 平面的 MPR 分析调整到内部骨骨盆的经典测量值相似。
